共查询到20条相似文献,搜索用时 93 毫秒
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介绍了能源农业的产生背景、发展现状,阐述了发展能源农业的意义,我国发展能源农业的优势,以及能源农业对现代农业的推进作用. 相似文献
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较系统地介绍了国内外矿物燃料的资源量、可采储量、消费量和使用年限.研究分析了国外可再生能源的发展现状和前景,介绍了我国可再生能源开发利用的情况和前景. 相似文献
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热处理燃料炉的现状与展望 总被引:4,自引:1,他引:3
通过对我国燃料炉主要技术的介绍,描述了我国热处理燃料炉的现状,指出了高效节能和环境保护是热处理燃料炉发展的两大关键,要改变现有的能源消费结构,以实现"绿色工业炉”的追求目标. 相似文献
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纤维素酶可以使构成植物细胞壁等不易利用的植物纤维分解成葡萄糖,从而提高玉米等秸秆的利用率,推动纤维素酶及燃料乙醇的工业发展及推广.主要阐述了纤维素的结构和纤维素酶的作用机理,并详细介绍了纤维素酶的发展与应用前景. 相似文献
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《冶金动力》2013,(4):60-60
2013年3月14日,美国哈斯科集团与河北钢铁集团唐钢集团在北京签约,双方决定就转炉煤气资源再利用展开合作,共同建设转炉煤气制乙醇项目。河北钢铁集团称,这是世界上第一次将生物技术应用到钢铁领域的实践。美国哈斯科集团是世界一流钢铁工业服务和工程产品制造企业。发酵法制乙醇是利用微生物技术将转炉煤气制成燃料乙醇,这种新的煤气利用方式具有更加清洁、高效的优势,开辟了世界转炉煤气再利用的新途径。河钢集团总经理、唐钢集团董事长于勇表示,燃料乙醇是中国政府鼓励使用的清洁燃料,哈斯科公司拥有转炉煤气发酵法制乙醇的专利使用权。此次合作为中国冶金转炉煤气循环再利用提供新途径,在世界钢企具有示范效应。该项目建成后,将进一步减少钢企转炉煤气放散量,提高资源能源利用效率。 相似文献
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固体生物质燃料是一种高效的清洁能源,可以替代化石燃料,缓解人类面临的能源危机和环境困境.在调研的基础上对固体生物质燃料产业存在的问题进行提炼和总结,找出阻碍固体生物质燃料产业链各子系统发展的核心问题.分析这些问题可为制订推进固体生物质燃料产业发展的政策方案提供事实依据和设计思路. 相似文献
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倪志安 《Canadian Metallurgical Quarterly》2011,23(3)
马克思主义唯物论是一种物本主义形态的唯物论,还是一种超越物本主义形态、从实践理解世界的本质相关问题的实践的唯物主义的唯物论?这是一个我们必须搞清楚的有关马克思主义唯物论的本质规定性和精神实质的重大问题.在考察物本主义的唯物论及其思维方式的局限性的基础上,揭示了马克思主义唯物论是现代的、实践的唯物主义,并重点研讨了马克思主义唯物论关于从实践理解世界的物质性和自然世界的先在性的原理,以期为马克思主义唯物论进一步阐明人类世界的实践性原理奠定基础. 相似文献
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D. N. Reznikov 《Metallurgist》1962,6(12):535-537
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The data are presented on changes in the rat arcuate nuclear neuron ultrastructure after using cyproheptadine (peritol, Egyt Pharmaceutical Works, Hungary) in a water suspension at a dose of 20 mg/kg once daily during 7 successive days and twice a day within 10 days. It was shown that cyproheptadine decreases the functional activity of the arcuate nuclear neurons, depending on the total amount of the drug used. Cyproheptadine-induced inhibition of the forming neurohormone release from neurons is likely to be one of the mechanisms of its therapeutic effect in Itsenko-Cushing's disease. 相似文献
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Vasomotor responses from the nasal mucosa and tongue, and contractions of the nictitating membrane, were recorded on stimulation of the cervical sympathetic or internal carotid nerves. Preganglionic sympathetic nerve fibres which elicited a membrane response possessed a lower threshold than those which evoked nasal vasoconstriction, while the latter displayed a lower threshold than fibres which evoked tongue vasoconstriction. The sympathetic vasodilator fibres to the tongue whose activity was revealed after alpha-receptor blockade, had a similar threshold to the vasoconstrictor fibres. Membrane contraction, nasal vasoconstriction and occasionally tongue vasoconstriction could be evoked by stimulating the internal carotid nerve. The postganglionic fibres innervating the nasal mucosa had a similar threshold to those of the nictitating membrane, which may indicate that there are small myelinated fibres innervating the mucosa. The preganglionic compound nerve action potential had four major components, S1-S4. S1, S2 and usually S3 fibres were associated with membrane contraction; S2, S3 and sometimes S1 fibres were associated with nasal vasoconstriction; and S3, usually S2 and occasionally S1 fibres were associated with vasoconstriction in the tongue. It is concluded that each of these three groups of nerve fibres, but not S4 fibres, may include fibres associated functionally with the three effectors. There was a considerable difference between the relative amplitude of the responses of the three effectors elicited by stimulation of the cervical sympathetic nerve at frequencies between 0.2 and 2 Hz. Vasoconstrictor responses were relatively larger than membrane contractions suggesting differences in the mechanisms of neurotransmission at the neuroeffector junctions. 相似文献
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